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Questions and Answers
What is the correct formula for magnesium chloride?
What is the correct formula for magnesium chloride?
- MgCl2 (correct)
- Mg2Cl
- MgCl3
- MgCl
In writing chemical formulas, why do we criss-cross the charges of combining atoms?
In writing chemical formulas, why do we criss-cross the charges of combining atoms?
- To indicate the type of bond
- To balance the valencies
- To balance the charges (correct)
- To make the compound neutral
What is the formula for sodium nitrate?
What is the formula for sodium nitrate?
- NaNO3 (correct)
- NaNO2
- NaN2O3
- Na2NO3
Why do we use brackets in chemical formulas?
Why do we use brackets in chemical formulas?
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What would be the formula for calcium oxide?
What would be the formula for calcium oxide?
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Which of the following is NOT a correct chemical formula?
Which of the following is NOT a correct chemical formula?
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Why is the formula for calcium hydroxide written as Ca(OH)2 and not CaOH2?
Why is the formula for calcium hydroxide written as Ca(OH)2 and not CaOH2?
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What is the correct formula for aluminum oxide?
What is the correct formula for aluminum oxide?
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If the valencies of two elements are different, how would you determine the formula of their compound?
If the valencies of two elements are different, how would you determine the formula of their compound?
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What could be the formula for hydrogen chloride if it followed the rules of criss-crossing valencies?
What could be the formula for hydrogen chloride if it followed the rules of criss-crossing valencies?
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